1、Designation:C40191(Reapproved 2005) Designation: C401 12Standard Classification ofAlumina and Alumina-Silicate Castable Refractories1This standard is issued under the fixed designation C401; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This classificati
3、on covers alumina and alumina-silicate castable refractories that, when tempered with water, will developstructural strength by chemical action.1.2The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are pr
4、ovided for information only and are not considered standard.1.31.2 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of theuser of this standard to establish appropriate safety and health practices and determine the applicability
5、 of regulatory limitationsprior to use.2. Referenced Documents2.1 ASTM Standards:2C113 Test Method for Reheat Change of Refractory BrickC133 Test Methods for Cold Crushing Strength and Modulus of Rupture of RefractoriesC134 Test Methods for Size, Dimensional Measurements, and Bulk Density of Refract
6、ory Brick and Insulating FirebrickC862 Practice for Preparing Refractory Concrete Specimens by CastingC865 Practice for Firing Refractory Concrete Specimens3. Significance and Use3.1 Alumina and alumina-silicate castable refractories are produced to yield property characteristics commensurate withdi
7、fferent end use properties. Volume stability, modulus of rupture, bulk density, and lime content have become useful measures todistinguish various alumina and alumina-silicate castable formulations for initial fitness for service. This classification isconsidered useful for purchase specifications a
8、nd for quality control.4. Basis of Classification4.1 Regular Castable RefractoriesThis class includes alumina and alumino-silicate castable refractories which containhydraulic-setting cement and which have a total lime (CaO) content greater than 2.5% on a calcined basis. Under this class,castables h
9、aving a modulus of rupture after drying of at least 300 psi (2.07 MPa) are normal-strength, and those having at least600 psi (4.14 MPa) modulus of rupture are high-strength types. They are further classified on the basis of volume stability of casttest brick when fired at the temperatures prescribed
10、 in4.1 Alumina and alumina silicate castable refractories that contain a hydraulic setting cement and have a density of greater than105 lb/ft3(1.68 g/cm3) may be classified by the lime (CaO) content as contributed by the cement. The classifications are shownin Table 1.4.2 Low-Cement Castable Refract
11、oriesThis class includes alumina and alumino-silicate castable refractories which containhydraulic-setting cement and which have a total lime (CaO) content of greater than 1.0 to 2.5% on a calcined basis.4.3 Ultra-Low Cement Castable RefractoriesThis class includes alumina and alumino-silicate casta
12、ble refractories whichcontain hydraulic-setting cement and which have a total lime (CaO) content of greater than 0.2 to 1.0% on a calcined basis.4.4 No-Cement Castable RefractoriesThis class includes alumina and alumino-silicate castable refractories which do notcontain hydraulic-setting cement and
13、in which the bonding agent(s) contribute no significant amount of lime (CaO). The product1This classification is under the jurisdiction of ASTM Committee C08 on Refractories and is the direct responsibility of Subcommittee C08.92, C08.92 The Joseph E.Kopanda Subcommittee for Editorial, Terminology a
14、nd Classification.Current edition approved Dec.March 1, 2005.2012. Published January 2006.April 2012. Originally approved in 1957. Last previous edition approved in 20002005 asC401 91 (2000).(2005). DOI: 10.1520/C0401-91R05.10.1520/C0401-12.2For referenced ASTM standards, visit the ASTM website, www
15、.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of w
16、hat changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered t
17、he official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.might contain up to 0.2% total lime (CaO) on a calcined basis as contributed by the aggregate.4.5 Insulating Castable RefractoriesThis class includes insulating cast
18、able refractories which are classified on the basis ofbulk density of dried cast test brick and volume stability of such test brick when fired at the temperatures prescribed in . Whilethis standard only uses the lime content as contributed by cement other sources of lime may be present in the mix an
19、d may affectthe performance of a material.4.2 Refractory castables classified as conventional castable refractories having a modulus of rupture after drying of at least 300psi (2.07 MPa) are normal-strength, and those having at least 600 psi (4.14 MPa) modulus of rupture are high-strength types. The
20、yare further classified on the basis of volume stability of cast test brick when fired at the temperatures prescribed in Table 2.4.3 Insulating Refractory Castables This class includes insulating castable refractories which are classified on the basis ofbulk density of dried cast test brick and volu
21、me stability of such test brick when fired at the temperatures prescribed in Table 3.5. Test Methods5.1 The properties enumerated in this classification shall be determined in accordance with the following ASTM methods:5.1.1 Modulus of RuptureTest Methods C133 on test brick with Practice C862, and a
22、fter oven-drying in accordance with theCuring of Test Specimens section of Practice C862. Specimens should be fired as given in heating schedule of Practice C865.5.1.2 Permanent Linear ShrinkagePermanent Linear ChangeTest Method C113 on specimens prepared in accordance withPractice C862 and fired as
23、 given in heating schedule of Practice C865.5.1.3 Bulk DensityTest Methods C134 on test brick prepared and oven-dried in accordance with Practice C862 and fired asgiven in heating schedule of Practice C865.6. Retests6.1 Because of variables resulting from sampling and the lack of satisfactory reprod
24、ucibility in tests conducted by differentTABLE 1 ReguClarsification of Dense Castable RefractoriesTest Requirements Classesof AluClassificationts Lime (Class A C#0.2 %No Cement Castable (NCC) #0.2 %Ulass B 0.2 % and #1.0 %Ultra-Low Cement Castable (ULCC) 0.2 % and #1.0 %Low ClassC Cl ass D Class E C
25、lass F Class GLow Cement Castables (LCC) 1.0 % ass D Class E Class F Class Gnd#2.5 %Permanent linear shrinkage, not more than 1.5 % when firedfor5hat2000F(1095C)2300F(1260C)2500F(1370C)2700F(1480C)2900F(1595C)3100F(1705C)3200F(1760C)Conventional Castables 2.5C) 2300F(1260C)2500F(1370C)2700F(1480C)29
26、00F(1595C)3100F(1705C)3200F(1760C) %TABLE 2 IConsulaventiongal Castable Refractories (Refer to 4.5)Test RequirementsRequirementsClasses of Insu Alatuminga-Silica Base Castable RefractoriesClass N A Class O B Class P C Class Q D Class RPermanent linear shrinkage, not more than1.5 %when fired for 5 h
27、at1700F(925C)1900F(1040C)2100F(1150C)2300F(1260C)2500F(1370C)Permanent linear shrinkage, not more than1.5 %when fired for 5 h atEClass F C)2100F(1150C)2300F(1260C)2500F(1370C)lass GMaximum bulk density, lb/ft3(g/cm3) afterdrying at220 to 230F (105 to 110C)55 (0.88) 65 (1.04) 75 (1.20) 90 (1.44) 95 (
28、1.52)Permanent linear change, notmore than 1.5 % when firedfor 5 h at:2000F(1095C)2300F(1260C)2500F(1370C)90 (1.44) 95 (1.52)Class S Class T Class U Class VPermanent linear shrinkage, not more than1.5 % when fired for 5 h atMaximum bulk density, lb/ft3(g/cm3) afterdrying at 220 to 230F (105 to 110C)
29、2700F(1480C)95 (1.52)2900F(1595C)100 (1.60)3000F(1650C) 105(1.68)3200F(1760C) 105(1.68)Permanent linear shrinkage, not more than1.5 % when fired for 5 h atMaximum bulk density, lb/ft3(g/cm3) afterdrying at 220 to 230F (105 to 110C)2700F(1480C)2900F(1595C)3100F(1705C)3200F(1760C) 105(1.68)C401 122lab
30、oratories, the material may be resampled and retested when requested by either the manufacturer or the purchaser. This mayapply in instances when the first test results do not conform to the requirements prescribed in this classification. The final resultsto be used shall be the average of at least
31、two sets of results, each of which has been obtained by following in detail the specifiedtesting procedures.7. Keywords7.1 alumina; alumina-silicate; castable refractories; insulating castable refractories; low-cement castable refractories; no-cementcastable refractories; regular castable refractori
32、es; ultra-low cement castable refractoriesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and t
33、he riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision
34、of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shoul
35、dmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtain
36、ed by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 3 Insulating Castabl
37、e RefractoriesTestRequirementsClasses of Insulating Castable RefractoriesClass N Class O Class P Class Q Class RPermanent linear change, not more than1.5 % when fired for 5 h at:1700F(925C)1900F(1040C)2100F(1150C)2300F(1260C)2500F(1370C)Maximum bulk density, lb/ft3(g/cm3) afterdrying at 220 to 230F
38、(105 to 110C)55 (0.88) 65 (1.04) 75 (1.20) 90 (1.44) 95 (1.52)Class S Class T Class U Class VPermanent linear change, not more than1.5 % when fired for 5 h at:2700F(1480C)2900F(1595C)3000F(1650C)3200F(1760C)Maximum bulk density, lb/ft3(g/cm3) afterdrying at 220 to 230F (105 to 110C)95 (1.52) 100 (1.60) 105 (1.68) 105 (1.68)C401 123
